A stainless steel box and repair method for repairing holes left in hoisting reinforced concrete roofs of prilling towers and silos

Abstract

The invention discloses a stainless steel box for repairing hoisting reserving holes of reinforced concrete roofs of prilling tower and silo and a repairing method. The repairing method comprises the following steps: according to the shape of the hoisting reserving hole, manufacturing the stainless steel box, setting a bending plate at the edge of the opening of the top of the box body; painting epoxy primer on the outer wall of the stainless steel box; establishing steps on the edge of the hoisting reserving hole; laying a first corrosion-resistant coiled material on the bottom wall of the roof, and coiling the edge of the first corrosion-resistant coiled material into the hoisting reserving hole, wherein the coiling height is 1 / 2 of the depth of the hoisting reserving hole; sticking a second corrosion-resistant coiled material on the outer wall of the box body, wherein the height of the second corrosion-resistant coiled material on the peripheral wall of the box body is 2 / 3 of the height of the box body; coating 4mm of epoxy grout on the inner walls and steps of the stainless steel box and the hoisting reserving hole; extruding the stainless steel box into the hoisting reserving hole; and pouring micro-expansion concrete with the same label as the roof into the inner cavity of the stainless steel box. The repairing method is capable of performing the corrosion prevention construction while the hoisting reserving hole is repaired, greatly improving the corrosion prevention performance of the repaired parts and roof bottom walls, and satisfying the corrosion prevention requirement of the prilling tower and silo roofs.

Description

technical field [0001] The invention relates to the construction field of repairing holes left in hoisting on reinforced concrete roofs of granulation towers and silos, in particular to a stainless steel box for repairing holes left in hoisting of reinforced concrete roofs of granulation towers and silos and a repair method. Background technique [0002] At present, most of the prilling towers and high silos adopt the integral rigid sliding form platform and are constructed in the form of sliding form. After the construction is completed, it is necessary to leave a number of square hoisting leftover holes on the roof as anchor points to facilitate the landing of the sliding form platform. Since there is no personnel operation surface on the bottom wall of the roof, the repair method of pouring concrete by hanging formwork is often used to repair the holes left over from hoisting. The details are as follows: Figure 4 As shown, adopt 8# iron wire 51 and hanging formwork wooden...

AI Technical Summary

Problems solved by technology

In this way, in addition to being unable to carry out anti-corrosion construction on the repaired parts and the bottom wall of the roof 52, the wooden formwork 54 is also not easy to remove, which is extremely unfavorable to the durability of the prilling tower and the high silo roof 52 requiring anti-corrosion

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